Instacalc Online Calculator

Faster than Calc, easier than Excel.

Results appear in real-time as you type. Use readable numbers, equations, and more:
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Help & Getting Started

Take the tour or browse all the commands below.

Basic Commands (Click to load example in new window)
Feature	Example	Result
Arithmetic + - * /	2 + 2 - 3 (3 * 5) / 2	1 7.5
Roots & powers	sqrt(9) 5^2	3 25
Percent	5% 100 * 17% 20 + 50%	0.05 17 30
Number shortcuts (k, m, b, t)	3.3k 200 million (or 200m) 6.6 billion (or 6.6b)	3,300 200,000,000 6,600,000,000
Exponent notation	1.234e3 1e-3	1,234 0.001
Variables & Rows
Using variables	x = 9 y = x + 3 sqrt(x) x + y	9 12 3 21
Using rows	r1 r2 r3 sum(r1:r3) average(r1:r3)	9 12 3 24 8
Unit Conversions
Convert unit into another (green means success): 15 feet into inches = 180 inches Can even convert rates: 15 miles/hour into feet/second = 22 feet/second 15 pounds/year in pounds/month = 1.25 pounds/month /, per, until, every
Weight: ounce (oz), pound (lb), ton gram (g), kilogram (kg), milligram (mg), microgram (ug) 150 lbs in kg = 68.038...kg
Length: mile, yard (yd), foot (ft), inch (in), knot, span, league kilometer (km), meter (m), cm, mm, nm, pm 15 feet in inches = 180 inches
Area (add "square" or "^2" to any unit) acre, square mile, yd^2, in^2... km^2, square meter, cm^2... 2 acres in m^2 = 8093.712... m^2
Volume (add "cubic" or "^3" to any unit) gallon (gal), quart (qt), pint (pt), cup (cp), fluid ounce (fl oz), tablespoon (tbsp), teaspoon (tsp), cubic inch, ft^3... Liter (L), milliliter (mL), cm^3 (cc), cubic km... 1500 cc in cubic inches = 91.53... cubic inches
Time second (sec), minute (min), hour (hr), day, month, year, decade, century millisecond (ms), microsecond (us), nanosecond (ns), picosecond (ps) 3 days in minutes = 4320 minutes
Currency (3-letter code) USD (US Dollar), EUR (Euro), JPY (Yen), BRL (Brazilian Real), GBP (British Pound), IRL (Indian Rupee), CNY (Chinese Yuan), MXN (Mexican Peso), HKD (Hong Kong Dollar), AUD (Australian Dollar), CAD (Canadian Dollar)... 15 USD in EUR = 11.59... EUR (weekly updates; general estimates only)
Rounding	round(3.51) roundup(3.01) rounddown(3.99)	4 4 3
Absolute value	abs(-2)	2
Factorial	3!	6
Formatting Cells
Currency formatting	$5 $5 / 3	$5.00 $1.67
Add comment (text to ignore)	30 + 40 // new total	70 new total
Hide row	Click result to hide row
Insert/remove row	Click "R1" to display row options
Making Charts
Enter data in rows	bob = 18 joe = 27 jim = 31	18 27 31
Type: bacrchart, piechart, linechart	barchart(r1:r3) (Variable names become labels)	Click for example
Other Number Commands
Random numbers	random random(10)	0.434... (from 0...1) 7 (from 1...10)
Rounding	round(3.51) roundup(3.01) rounddown(3.99)	4 4 3
Absolute value	abs(-2)	2
Factorial	3!	6
Trigonometry & Logarithms
Constants	PI E	3.14159... 2.71828...
Degrees & radians (degrees by default)	30 30 deg PI rad	30 30 180
sin, cos, tan asin, acos, atan	sin(30) sin(PI/4 rad)	0.5 0.707...
e^x Natural Log (ln) Log base 10 (log)	exp(2) E^2 ln(2) log(2)	7.389... 7.389... 0.693.. 0.301...
Computer Units
File sizes (bytes) (kb, mb, gb, tb, pb)	1kb 10 gb / 5mb	1024 2048
Bandwidth (bits/sec) (kbps, mpbs, gbps)	1.5 mbps	196,608 (converted to bytes/sec)
Time	time(90) time(1gb / 1.5mbps)	1m 30.00s 1h 31m 1.333s
Base Conversion
Into decimal	0b1001 (binary) 0o567 (octal) 0xfeff (hex)	9 375 65,279
From decimal	bin(9) oct(375) hex(65,279)	0b00001001 0o567 0xfeff
Programming
Binary operators (and or xor not)	bin(a = 3) bin(b = 5) a and b bin(a and b) a or b a xor b not a	0b00000011 0b00000101 1 0b00000001 7 6 -4 (two's complement)
Logical operators (> >= == <= <)	2 * 2 > 3 x = 3 2 * 2 > x	true 3 true
Conditional statements	if (3 > 2){"bigger"} else {"smaller or equal"}	bigger
Shorthand	x = 3 ++x x += 3	3 4 7

Charts [load example]

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